Yikes! Yeah, numbness and shocking pain aren’t really my thing either.
In the case of the plant reference (I know, not the same thing) the amount of current was very low and applied either to the hydroponic medium or through electrodes into the soil itself.
Another thing relating to this; cancer cells multiply much more rapidly in a 60Hz ambient electromagnetic field, I’ve read. Why is 60Hz sigificant? Because it’s the ambient field wavelength of the power grid we surround ourselves with- i.e., all of our appliances, TVs, computers, etc. put off an ambient 60Hz “hum”. Ever had an electric fan interfere with a video monitor? That’s electromagnetic field overlap.
Anyway, that’s not the point. The point is that cancer is ultimately extreme (and extremely undesirable) hyperplasia in a sense, no? And if so, by extension one might argue for the possibility of lower intensities, frequencies, etc., inducing rapid cellular growth instead of cancerous growth.
I guess it’s all academic until someone actually tries it, but I’m not sure I’d know where to begin…. not to mention possible negative side effects.